JP2007330281A - Knuckle device for vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lower the sound pressure level of collision sound due to the play of both first disk body and second disk body as much as possible by a simple and inexpensive configuration in a knuckle device provided with the first disk body and the second disk body fitted so as to be relatively rotated. <P>SOLUTION: The knuckle device for a vehicle seat is provided with the first disk body 1 fixed and arranged on a seat back side and the second disk body 2 attached to a seat cushion side in the state of making the inner peripheral surface 2a closely face the outer peripheral surface 1a of the first disk body 1 on the diameter direction outer side of the first disk body 1, wherein a fitting body 5 in a thin plate shape is fitted and fixed between the outer peripheral surface 1a of the first disk body 1 and the inner peripheral surface 2a of the second disk body 2 in a state in which the outer peripheral surface 5a is brought into close contact with the inner peripheral surface 2a of the second disk body 2 and an annular clearance 15 is kept between the inner peripheral surface 5b and the outer peripheral surface 1a of the first disk body 1. By such a configuration, by the attenuation action of vibration waves at the boundary part of the fitting body 5 and the second disk body 2, the sound pressure level of the collision sound due to the play is reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a knuckle device that is provided between a seat cushion and a seat back of a vehicle seat and adjusts the tilting posture of the seat back.

  Various knuckle devices for vehicle seats have been proposed in the past, and one of them is to attach a first disc body with an internal tooth-shaped sector gear to a bracket on the seat back side, A second disc body provided with a lock gear capable of meshing with the sector gear is attached to a bracket on the seat cushion side with its inner peripheral surface being closely opposed to the outer peripheral surface of the first disc body, It is known that the tilting posture of the seat back can be adjusted by relatively rotating the one disc body and the second disc body (for example, see Patent Documents 1 and 2).

Japanese Utility Model Publication No. 2000-201759 JP2003-180478A.

  By the way, in the knuckle device that is configured such that the first disk body and the second disk body are opposed to the outer peripheral surface of the first disk body in close proximity to the inner peripheral surface of the second disk body, In view of the configuration in which both are rotated relative to each other, it is necessary to secure a predetermined annular gap between the outer peripheral surface of the first disc body and the inner peripheral surface of the second disc body.

  However, the presence of the annular gap inevitably causes the first disc body and the second disc body to be relatively displaced in the radial direction (that is, rattling in the radial direction) due to, for example, running vibration of the vehicle. As a result, both of them collide due to rattling, and the collision sound is perceived as an irritating noise by the vehicle occupant, which in turn impairs the commercial value of the knuckle device. It will be.

  Therefore, the present invention relates to a knuckle device configured to include a first disk body and a second disk body fitted so as to be capable of relative rotation. The purpose of this is to make it as small as possible with a simple and inexpensive configuration.

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

  In the first invention of the present application, the first disc body 1 provided with an internal tooth-shaped sector gear 12 and fixedly arranged on the seat back side, the lock gear 13 that can mesh with the sector gear 12, and the first The second disk body 2 attached to the seat cushion side in a state where the inner peripheral surface 2a is closely opposed to the outer peripheral surface 1a of the first disk body 1 is provided outside the disk body 1 in the radial direction. In the vehicle seat knuckle device, a thin plate-like fitting body 5 is provided between the outer peripheral surface 1 a of the first disc body 1 and the inner peripheral surface 2 a of the second disc body 2. Is closely attached to the inner peripheral surface 2a of the second disc body 2, and is fitted and fixed in a state where an annular gap 15 is secured between the inner peripheral surface 5b and the outer peripheral surface 1a of the first disc body 1. It is characterized by that.

  In the second invention of the present application, the first disc body 1 having an internal tooth-shaped sector gear 12 and fixedly arranged on the seat back side, the lock gear 13 that can mesh with the sector gear 12, and the first The second disk body 2 attached to the seat cushion side in a state where the inner peripheral surface 2a is closely opposed to the outer peripheral surface 1a of the first disk body 1 is provided outside the disk body 1 in the radial direction. In the vehicle seat knuckle device, a thin plate-like fitting body 5 is disposed between the outer peripheral surface 1a of the first disc body 1 and the inner peripheral surface 2a of the second disc body 2. 5b is closely attached to the outer peripheral surface 1a of the first disc body 1 and is fitted and fixed in a state where an annular gap 15 is secured between the outer peripheral surface 5a and the inner peripheral surface 2a of the second disc body 2. It is characterized by.

  The third invention of the present application is characterized in that, in the vehicle seat knuckle device according to the first or second invention, the fitting body 5 is formed in an annular shape.

  According to a fourth invention of the present application, in the knuckle device for a vehicle seat according to the first or second invention, the fitting body 5 has an arc shape and a plurality of the fitting bodies 5 are arranged in the circumferential direction.

  In the present invention, the following effects can be obtained.

  (A) According to the knuckle device for a vehicle seat according to the first invention of the present application, a thin plate shape is provided between the outer peripheral surface 1a of the first disc body 1 and the inner peripheral surface 2a of the second disc body 2. The outer peripheral surface 5a of the fitting body 5 is brought into close contact with the inner peripheral surface 2a of the second disc body 2, and an annular shape is provided between the inner peripheral surface 5b and the outer peripheral surface 1a of the first disc body 1. Since the gap 15 is secured and secured, the presence of the annular gap 15 causes the first disc body 1 and the second disc body 2 to rattle in the radial direction due to vehicle vibrations, etc. The outer peripheral surface 1a of the one disc body 1 and the inner peripheral surface 2a of the second disc body 2 collide to generate a collision sound. In the present invention, since the fitting body 5 is provided, The outer peripheral surface 1a of the first disc body 1 and the inner peripheral surface 5b of the fitting body 5 collide, and a collision sound is generated at the collision portion. .

  On the other hand, the collision sound generated here, that is, the vibration wave, propagates in the first disk 1 and is diffused to the outside. On the other hand, it propagates from the fitting body 5 to the second disk body 2 and is diffused to the outside. The sum of the collision sound radiated from the first disk body 1 side and the collision sound radiated from the second disk body 2 side is detected by the seat occupant as an irritating abnormal sound, and is extended. As a result, the commercial value of the knuckle device Z is lowered.

  However, in this case, in the present invention, the fitting body 5 is fitted and fixed in a state in which the outer peripheral surface 5a thereof is in close contact with the inner peripheral surface 2a of the second disc body 2. When a vibration wave propagates from the 5 side to the second disk body 2 side, the vibration wave is greatly attenuated at the boundary surface portion between them, and the vibration level of the vibration wave propagated to the second disk body 2 side (That is, the amplitude of the vibration wave) is made as small as possible. Therefore, the sound pressure level of the collision sound that propagates through the second disk 2 and is diffused to the outside is suppressed.

  As a result, when the knuckle device Z is viewed as a whole, although it is a simple and inexpensive configuration including the fitting body 5, the amount of vibration wave attenuation on the fitting body 5 and the second disc body 2 side is harsh. Therefore, the sound pressure level of the impact sound can be reduced, and as a result, the product value of the knuckle device Z can be expected to be improved.

  (B) According to the vehicle seat knuckle device according to the second invention of the present application, the first disc body 1 provided with the internal tooth-like sector gear 12 and fixedly arranged on the seat back side, and the sector gear 12 described above. And is attached to the seat cushion side in a state where the inner peripheral surface 2a is closely opposed to the outer peripheral surface 1a of the first disc body 1 on the outer side in the radial direction of the first disc body 1. In the vehicle seat knuckle device configured to include the second disc body 2, a thin plate is disposed between the outer peripheral surface 1 a of the first disc body 1 and the inner peripheral surface 2 a of the second disc body 2. The fitting body 5 has an inner peripheral surface 5b in close contact with the outer peripheral surface 1a of the first disc body 1, and an annular shape between the outer peripheral surface 5a and the inner peripheral surface 2a of the second disc body 2. Since the fitting is fixed with the clearance 15 secured, the presence of the annular clearance 15 The first disc body 1 and the second disc body 2 rattle in the radial direction due to vehicle vibration or the like, and the outer peripheral surface 1a of the first disc body 1 and the inner peripheral surface 2a of the second disc body 2 are In the present invention, since the fitting body 5 is provided, the inner peripheral surface 2a of the second disc body 2 and the outer circumference of the fitting body 5 are actually produced. The surface 5a collides, and a collision sound is generated at this collision site.

  On the other hand, the collision sound generated here, that is, the vibration wave, propagates in the second disk body 2 and is dissipated to the outside. On the other hand, it propagates from the fitting body 5 to the first disc body 1 and is diffused to the outside. The sum of the collision sound radiated from the first disk body 1 side and the collision sound radiated from the second disk body 2 side is detected by the seat occupant as an irritating abnormal sound, and is extended. As a result, the commercial value of the knuckle device Z is lowered.

  However, in this case, in the present invention, the fitting body 5 is fitted and fixed in a state in which the inner peripheral surface 5b thereof is in close contact with the outer peripheral surface 1a of the first disc body 1. When the vibration wave propagates from the 5 side to the first disc body 1 side, the vibration wave is greatly attenuated at the boundary surface portion between them, and the vibration level of the vibration wave propagated to the first disc body 1 side is reduced. (That is, the amplitude of the vibration wave) is made as small as possible. Therefore, the sound pressure level of the collision sound that propagates through the first disk 1 and is diffused to the outside is suppressed to a low level.

  As a result, when the knuckle device Z is viewed as a whole, although it is a simple and inexpensive configuration including the fitting body 5, the amount of vibration wave attenuation on the fitting body 5 and the first disc body 1 side is harsh. Therefore, the sound pressure level of the impact sound can be reduced, and as a result, the product value of the knuckle device Z can be expected to be improved.

  (C) According to the knuckle device for a vehicle seat according to the third invention of the present application, in addition to the effects described in (a) or (b), the following specific effects can be obtained. In other words, in the present invention, the fitting body 5 is formed in an annular shape, so that the first disk body 1 and the second disk body 2 are loosely moved so that they are positioned at any position in the circumferential direction. The vibration wave attenuation effect can be obtained with certainty even if a collision occurs at, and the effect described in (a) above can be made more reliable.

  Moreover, the mounting work of the fitting body 5 to the first disk body 1 or the second disk body 2 is easy, and the assembly man-hour can be reduced.

  (D) According to the knuckle device for a vehicle seat according to the fourth invention of the present application, in addition to the effects described in (a) or (b), the following specific effects can be obtained. That is, in the present invention, since the fitting body 5 has an arcuate shape and a plurality thereof are arranged in the circumferential direction, for example, the fitting body 5 is compared with a case where the fitting body 5 is an annular shape. The body 5 can be reduced in weight and cost.

Hereinafter, the present invention will be specifically described based on preferred embodiments.
A: First Embodiment FIGS. 1 to 3 show a knuckle device Z1 for a vehicle seat according to a first embodiment of the present invention. The knuckle device Z1 includes a first disk body 1 and a second disk body 2 described below that are fitted and arranged in an opposing state.

  The first disc body 1 is a plate-like member having a substantially dish-like cross-sectional shape provided with an internal tooth-shaped sector gear 12 on the outer peripheral edge thereof, and is provided on the lower end side of the seat back. The bracket 3 is fixed to the bracket 3 with the opening side facing outward in the seat back width direction.

  The second disc body 2 is a plate-like member having a substantially dish-like cross-sectional shape larger in diameter than the first disc body 1, and the opening side of the second disc body 2 is the opening side of the first disc body 1. And the inner peripheral surface 2a provided on the outer peripheral edge of the first disc body 1 is opposed to the outer peripheral surface 1a of the first disc body 1 from the outside in the radial direction. And are arranged in a coaxial manner at a position.

  And as shown in FIG.2 and FIG.3, between the outer peripheral surface 1a of the said 1st disc body 1 and the inner peripheral surface 2a of the said 2nd disc body 2 which oppose in radial direction, the following description is carried out. The fitting body 5 is fitted and fixed.

  That is, as shown in FIGS. 4 and 5, the fitting body 5 is formed by annularly forming a thin strip (for example, a thickness of about 0.05 mm), and its inner peripheral surface. 5b is attached in a state of being closely fitted to the inner peripheral surface 2a of the second disc body 2. And in this attachment state, between the inner peripheral surface 5b of the fitting body 5 and the outer peripheral surface 1a of the first disc body 1, an annular gap 15 having a predetermined gap dimension is secured, Due to the presence of the annular gap 15, the first disc body 1 and the second disc body 2 can be rotated relative to each other.

  2 and 3, a pair of guide pieces 14a and 14a facing each other at a predetermined interval are provided at two positions opposed to each other on the inner bottom surface of the second disc body 2 as shown in FIGS. Each of the guides 14 is provided. And between the pair of guide pieces 14a, 14a of the guides 14, 14, the lock plates 6 described below are movably disposed.

  The lock plate 6 includes a lock gear 13 that meshes with the sector gear 12 on an outer end surface thereof, and a cam surface 16 on an inner end surface thereof. The lock plates 6 and 6 are guided by the guide 14 and moved in the radial direction so that the lock gear 13 is engaged with or disengaged from the sector gear 12. In order to engage or disengage the lock plates 6 and 6, a cam plate 7 and an operation shaft 8 described below are provided.

  As shown in FIGS. 2 and 3, the cam plate 7 includes cams 7a and 7a at two positions sandwiching the center thereof in the radial direction, and an operating shaft 8 disposed through the center. It can be turned to one side (in the direction of arrow B) by a turning operation. The cam plate 7 is always urged to rotate to the other side (arrow A direction) by a pair of left and right springs 9.

  As shown in FIG. 2, when the cam plate 7 is urged to rotate in the direction of arrow A by the urging force of the springs 9, the lock plates 6, 6 are moved by the cam plate 7. The lock gear 13 is pushed outward in the radial direction and meshes with the sector gear 12 on the first disc body 1 side, thereby restricting relative rotation of the first disc body 1 and the second disc body 2. (Locked)

  On the other hand, as shown in FIG. 3, the operation shaft 8 is rotated in the direction of the arrow B against the urging force of the springs 9 and 9 by operating the handle 11, whereby the cam plate 7 is released, and the lock plates 6 and 6 are pulled back radially inward by the cam action of the kick plate 10 provided on the first disc body 1 side. The lock gear 13 is engaged and disengaged from the sector gear 12 on the first disc body 1 side, thereby permitting relative rotation of the first disc body 1 and the second disc body 2 (unlocked state). The seat back tilt posture can be changed and adjusted.

  The above is the specific configuration and operation of the knuckle device Z1.

  By the way, as described above, the outer peripheral surface 1a of the first disc body 1 and the inner peripheral surface 5b of the fitting body 5 fitted and fixed on the inner peripheral surface 2a of the second disc body 2. In the meantime, in order to allow relative rotation of the first disc body 1 and the second disc body 2, the annular gap 15 is secured. While providing an indispensable function for realizing relative rotation, on the other hand, it provides a negative function for assisting rattling in the radial direction of the first disc body 1 and the second disc body 2. . As a result, for example, the first disc body 1 and the second disc body 2 are rattled in the radial direction due to vibrations or the like when the vehicle travels, and the outer peripheral surface 1a of the first disc body 1 and the fitting 5 The inner peripheral surface 5b collides with each other, and a collision sound is generated at the collision portion.

  On the other hand, the collision sound generated here, that is, the vibration wave, propagates in the first disk 1 and is diffused to the outside. On the other hand, it propagates from the fitting body 5 to the second disk body 2 and is diffused to the outside. The sum of the collision sound radiated from the first disk body 1 side and the collision sound radiated from the second disk body 2 side is detected by the seat occupant as an irritating abnormal sound, and is extended. As described above, there is a possibility that the commercial value of the knuckle device Z1 may be lowered.

  However, in this embodiment, the fitting body 5 is fitted and fixed on the inner peripheral surface 2a of the second disc body 2 with the outer peripheral surface 5a in close contact with the inner peripheral surface 2a. Therefore, the collision sound propagating from the fitting body 5 to the second disk body 2 side is greatly attenuated by the vibration wave at the boundary surface portion between the fitting body 5 and the second disk body 2. The vibration level (that is, the amplitude of the vibration wave) is made as small as possible. Therefore, the sound pressure level of the collision sound propagating through the second disc body 2 and dissipating to the outside is suppressed to a low level. As a result, when the entire knuckle device Z1 is viewed, the fitting body 5 is provided. Although it is an inexpensive configuration, the sound pressure level of the annoying collision sound is reduced by the amount of attenuation of the vibration wave on the fitting body 5 and the second disk body 2 side, and thus the commercial value of the knuckle device Z1 is reduced. Improvements can be expected.

In this case, in this embodiment, since the fitting body 5 is formed in an annular shape, both the circumferential direction of the first disk body 1 and the second disk body 2 due to the backlash of the first disk body 1 and the second disk body 2. Even if it collides in any position of these, the damping effect of a vibration wave can be acquired reliably, and the said effect becomes more reliable.
B: Second Embodiment FIG. 6 shows a main part (corresponding to FIG. 4 in the first embodiment) of a knuckle device Z2 for a vehicle seat according to a second embodiment of the present invention. . The knuckle device Z2 has the same basic structure as that of the knuckle device Z1 according to the first embodiment. The knuckle device Z2 is different from the knuckle device Z1 according to the first embodiment. Whereas the body 5 is closely fitted onto the inner peripheral surface 2a of the second disc body 2, in the knuckle device Z2 of this embodiment, the body 5 is connected to the first circle. This is a point where the plate body 1 is closely fitted onto the outer peripheral surface 1a.

  Accordingly, the configuration and operational effects other than those described above are referred to the corresponding description in the first embodiment, and only the differences will be described below.

  That is, in the knuckle device Z2 according to this embodiment, as shown in FIG. 6, the outer peripheral surface 1a of the first disc body 1 and the inner peripheral surface 2a of the second disc body 2 that are opposed in the radial direction. In the meantime, the fitting body 5 is attached in a state where its inner peripheral surface 5b is closely fitted to the outer peripheral surface 1a of the first disc body 1, while the outer peripheral surface 5a of the fitting body 5 and the first An annular gap 15 having a predetermined gap dimension is secured between the inner surface 2 a of the two-disc body 2.

  Therefore, in the knuckle device Z2 of this embodiment, as in the case of the knuckle device Z1 of the first embodiment, the presence of the annular gap 15 causes the first disc body 1 and the second disc body 2 to The play in the radial direction is assisted, and for example, the first disc body 1 and the second disc body 2 play in the radial direction due to vibrations or the like when the vehicle travels, and the inner peripheral surface of the second disc body 2 2a and the outer peripheral surface 5a of the fitting body 5 collide, and a collision sound is generated at the collision portion.

  On the other hand, the collision sound generated here, that is, the vibration wave, propagates in the second disk body 2 and is dissipated to the outside. On the other hand, it propagates from the fitting body 5 to the first disc body 1 and is diffused to the outside. The sum of the collision sound radiated from the first disk body 1 side and the collision sound radiated from the second disk body 2 side is detected by the seat occupant as an irritating abnormal sound, and is extended. As described above, there is a possibility that the commercial value of the knuckle device Z2 may be lowered.

However, in this embodiment, the fitting body 5 is fitted and fixed on the outer peripheral surface 1a of the first disc body 1 with the inner peripheral surface 5b in close contact with the outer peripheral surface 1a. The collision sound propagating from the fitting body 5 to the first disc body 1 side is greatly attenuated by the vibration wave at the boundary surface portion between the fitting body 5 and the first disk body 1. The vibration level (that is, the amplitude of the vibration wave) is made as small as possible. Therefore, the sound pressure level of the collision sound that propagates through the first disc body 1 and is dissipated to the outside is suppressed to a low level. As a result, when the knuckle device Z2 is viewed as a whole, the fitting body 5 is provided. Although it is an inexpensive configuration, the sound pressure level of an annoying collision sound is reduced by the amount of attenuation of the vibration wave on the fitting body 5 and the first disc body 1 side, and thus the commercial value of the knuckle device Z2 is reduced. Improvements can be expected.
C: Third Embodiment FIG. 7 shows a main part (corresponding to FIG. 4 in the first embodiment) of a knuckle device Z3 for a vehicle seat according to a third embodiment of the present invention. . The knuckle device Z3 has the same basic structure as that of the knuckle device Z1 according to the first embodiment, and differs from the knuckle device Z1 in the knuckle device Z1 according to the first embodiment. The body 5 is formed in an annular shape, and this is closely fitted onto the inner peripheral surface 2a of the second disc body 2, whereas in the knuckle device Z3 of this embodiment, The fitting body 5 has an arcuate shape and a plurality thereof are arranged in the circumferential direction.

  By setting it as such a structure, the weight reduction and cost reduction of this fitting body 5 can be achieved compared with the case where the said fitting body 5 is made into a cyclic | annular form, for example.

  In addition, about the structure and effect other than the above, the corresponding description in the said 1st Embodiment is used.

  The fitting body 5 is attached to the inner peripheral surface 2a of the second disc body 2 by means such as adhesion or spot welding.

  Further, in this embodiment, the arcuate shaped fitting 5 is mounted on the inner peripheral surface 2a of the second disc body 2, but in other embodiments, the fitting 5 is the above-mentioned It can also be mounted on the outer peripheral surface 1a of the first disc body 1.

1 is a longitudinal sectional view of a knuckle device for a vehicle seat according to a first embodiment of the present invention. It is the II-II arrow line view of FIG. 1, and has shown the locked state. It is the II-II arrow line view of FIG. 1, and has shown the unlocked state. It is an enlarged view of the IV section of FIG. It is a perspective view of the ring shown in FIG. It is a principal part enlarged view of the knuckle apparatus for vehicle seats which concerns on 2nd Embodiment of this invention. It is a principal part enlarged view of the knuckle apparatus for vehicle seats which concerns on 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ·· 1st disc body 2 ·· 2nd disc body 3 ··· 1st bracket 4 ·· 2nd bracket 5 ·· Insertion body 6 · · Lock plate 7 · · Cam plate 8 · · Operation shaft 9 · · Spring 10 · · Kick plate 11 · · Handle 12 · · Sector gear 13 · · Lock gear 14 · · Guide 15 · · Annular gap 16 · · Cam surface Z, Z1 to Z3 · · Knuckle device

Claims (4)

A first disc body (1) having an internal tooth-shaped sector gear (12) and fixed to the seat back side, a lock gear (13) meshable with the sector gear (12), and the first circle A second circle attached to the seat cushion side with the inner peripheral surface (2a) being closely opposed to the outer peripheral surface (1a) of the first disc body (1) on the outer side in the radial direction of the plate (1). A knuckle device for a vehicle seat configured to include a plate body (2),
Between the outer peripheral surface (1a) of the first disc body (1) and the inner peripheral surface (2a) of the second disc body (2), a thin plate-like fitting body (5) is provided on the outer peripheral surface. (5a) is in close contact with the inner peripheral surface (2a) of the second disc body (2), and between the inner peripheral surface (5b) and the outer peripheral surface (1a) of the first disc body (1). A knuckle device for a vehicle seat, which is fitted and fixed in a state in which an annular gap (15) is secured. A first disc body (1) having an internal tooth-shaped sector gear (12) and fixedly arranged on the seat back side, a lock gear (13) that can mesh with the sector gear (12), and the first disc The second attached to the seat cushion side in a state where the inner peripheral surface (2a) is closely opposed to the outer peripheral surface (1a) of the first disc body (1) on the outer side in the radial direction of the disc body (1). A knuckle device for a vehicle seat configured to include a disk body (2),
Between the outer peripheral surface (1a) of the first disc body (1) and the inner peripheral surface (2a) of the second disc body (2), a thin plate-like fitting body (5) is provided. The surface (5b) is brought into close contact with the outer peripheral surface (1a) of the first disc body (1), and between the outer peripheral surface (5a) and the inner peripheral surface (2a) of the second disc body (2). The vehicle seat knuckle device is fitted and fixed in a state in which the annular gap (15) is secured. In claim 1 or 2,
The vehicle seat knuckle device, wherein the fitting body (5) has an annular shape. In claim 1 or 2,
A knuckle device for a vehicle seat, wherein the fitting body (5) has an arcuate shape and is arranged in a plurality in the circumferential direction.

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